与BroadcastReceiver的Andr​​oid的NFC标签接收 [英] Android NFC tag received with broadcastreceiver

问题描述

我试图抓住NFC标签的广播接收器，所以我写了一个打印ASD中的onReceive一个简单的BR（）。在清单XML它的desribed这样的：

I'm trying to catch NFC tag in broadcast receiver so I wrote a simple BR that prints "asd" in the onReceive(). In the manifest xml it's desribed like that:

                              

和我收到仅此打印可言......

and I receive only this and no print at all....

01-31 16:37:18.980: ERROR/MediaPlayer(990): setAudioStream called in state 8
01-31 16:37:18.980: ERROR/MediaPlayer(990): error (-38, 0)
01-31 16:37:18.980: ERROR/MediaPlayer(990): start called in state 0
01-31 16:37:18.980: ERROR/MediaPlayer(990): error (-38, 0)
01-31 16:37:18.988: ERROR/MediaPlayer(990): Error (-38,0)

当我使用的活动来处理这样的意图：

When I use activity to handle the intent like this:

<activity android:name="TagViewer"
            android:theme="@android:style/Theme.NoTitleBar">
            <intent-filter>
                <action android:name="android.nfc.action.TAG_DISCOVERED"/>
                <category android:name="android.intent.category.DEFAULT"/>
            </intent-filter>
</activity>

该活动开始，可以正常使用，所以我怎么能使其与BroadcastReceiver的工作？

The activity is started and working perfectly, so how can I make it work with BroadcastReceiver?

推荐答案

您可以写一个小的活动，不显示任何UI可言，发送广播消息，然后用抛光结束（）。在清单中使用的标志，你能避免它显示了在历史上还是在最近通话和被faily无形的，希望得到一个类似的效果，你的愿望与braodcast接收器。

You could write a small activity that doesn't show any UI at all, sends a broadcast message and then ends with finish(). Using flags in the manifest you can avoid it showing up in history or in recents and being faily invisible, hopefully getting a similar effect to that you desire with the braodcast receiver.

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